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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. When are dairy cattle dehorned?
sow ovulation
Dairy calves are removed from cow at birth to...
Dairy Cattle milking schedule
~1 month
2. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
age and castration
Holstein Cow
Sperm survival specs
estrous
3. 14-19 (17) days
ewe estrus cycle
Bull's fibro-elastic penis
sow ovulation
oviducts
4. Prevent the cow from getting an infection from the calve
1. more cost effective - 2. powdered milk is in excess production
stag
polyestrous
Dairy calves are removed from cow at birth to...
5. 19-23 (21) days
cow estrus cycle
seasonally polyestrous
age and castration
sow estrus
6. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
dartos muscle
scrotal circumference (BSE)
ewe's estrous cycle
van deferens
7. What about the sperm for a bull which has been castrated but still has testicles?
epididymis: definition - 3 parts - 4 functions
cow gestation
testis (gonads)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
8. 19-23 (21) days
penis proper
sow estrus cycle
dairy cattle pregnancy check
dartos muscle
9. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
libido test (BSE)
scrotal circumference (BSE)
Holstein Cow
Follical Stimulating in males
10. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
feeding a high producing dairy cow
retractor muscles
Hard
reasons for castration
11. Important 'landmark' during palpation
prostate gland
cervix
uterus
estrous
12. 30 hours after estrus begins
hormones
libido test (BSE)
functions of progestrone
cow ovulation
13. Male on one pin and female on other side
Parturition
Dairy Cattle milking schedule
libido test (BSE)
organs used in spermatogenesis
14. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
1. more cost effective - 2. powdered milk is in excess production
Mares
epididymis: definition - 3 parts - 4 functions
Sperm survival specs
15. Sperm is produced here
oviducts
Lutinizing Hormone in females
seminiferous tubules
feeding a high producing dairy cow
16. (LH) stimulates the Leydig cells to produce testosterone
mare ovulation
Lutinizing Hormone in males
cryptorchid
polyestrous
17. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.
femininity of a heifer
why does the cow need fat deposits during pregnancy?
reasons for castration
cow gestation
18. Why does estrus happen before ovulation?
cow estrus cycle
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Sperm survival specs
Size of cow in relation to the amount of milk produced
19. 336 days
Mares
mare gestation
organs used in spermatogenesis
estrus
20. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
normal presentation of the fetus
Blood
oviducts
mare's estrous cycle
21. 45-60 days after breeding; re-breed as required
Where livelihood is in agriculture
dairy cattle pregnancy check
Where livelihood is in agriculture
age and castration
22. Check feet and legs - look for masculine traits in build such as crest and muscling
testis (gonads)
sow estrus cycle
sperm cell
visual evaluation (BSE)
23. Start of the reproductive tract for the female. located outside of the body
vulva
scrotal circumference (BSE)
mare estrus cycle
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
24. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
retractor muscles
cow estrus cycle
mastitis
why does the cow need fat deposits during pregnancy?
25. Scar tissue plugs up chambers of udder
mastitis
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
behavioral signs of estrus
age and castration
26. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge
cowper's gland
behavioral signs of estrus
eminal vesicles
dry matter and water
27. 147 days
mare's estrous cycle
ewe gestation
scrotum
urethra
28. Animals which have many estrous periods per year (ex: cow - sow)
monestrous
polyestrous
what has to happen for males for copulation to occur
purpose of Breeding Soundness Exam (BSE) for males
29. ~305 days (altough often longer due to breeding difficulties)
cremaster muscle
Dairy Cattle Lactation (standard)
kidney stones also called ________ ___________ can develop in the sigmoid flexure
sow estrus cycle
30. ~60 days before calving
dry-off time in dairy cattle
Parturition
urethra
sertoli cells
31. Allows extension of penis without fibro-elastic penis
sigmoid flexure
burdizzo
hypothalamus and pituitary gland
colostrum
32. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
oviducts
Follical Stimulating in females
Hard
hormones
33. Front feet and head first. (except for hogs and dogs)
growth lost from castration methods (knife & band)
normal presentation of the fetus
cow estrus
things to check for in a breeding soundness exam (BSE)
34. Produce testosterone. located between the seminiferous tubules
functions of progestrone
ewe gestation
Jersey Cow
leydid or interstitial cells
35. FEED
butterfat
#1 cost in production
prostaglandin
butterfat
36. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
sow gestation
accessory sex glands
reason for seasonal breeding periods
retractor muscles
37. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
Lutinizing Hormone in females
Sperm survival specs
cow ovulation
effects of estrogen
38. 1-2 days
Dairy Cattle Lactation (standard)
spermatogenesis
ewe estrus
6-8 weeks
39. 14-19 (17) days
4 major reasons for culling dairy cows
ewe estrus cycle
Dairy Cattle Gestation
cow ovulation
40. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
femininity of a heifer
organs used in spermatogenesis
burdizzo
Lutinizing Hormone in males
41. Male on one pin and female on other side
libido test (BSE)
dairy cattle pregnancy check
Lutinizing Hormone in males
seminiferous tubules
42. What helps regulate spermatogenesis?
testosterone
kidney stones also called ________ ___________ can develop in the sigmoid flexure
reason for seasonal breeding periods
femininity of a heifer
43. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
polyestrous
functions of progestrone
Lutinizing Hormone in females
behavioral signs of estrus
44. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Sperm growth rate
Holstein Cow
Reasons for gestation length being affected
accessory sex glands
45. 24 hours before end of estrus cycle
estrous
Follical Stimulating in females
mare ovulation
van deferens
46. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
cervix
oviducts
Culls bulls earlier (2 reasons)
scrotal circumference (BSE)
47. What makes the milk flow through the mammary glands?
retractor muscles
Blood
age and castration
testosterone
48. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
effects of estrogen
cow ovulation
uterus
growth lost from castration methods (knife & band)
49. Luteolysis happens because of the ____________ hormone
mare estrus cycle
eminal vesicles
prostaglandin
epididymis: definition - 3 parts - 4 functions
50. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
cervix
things to check for in a breeding soundness exam (BSE)
hypothalamus and pituitary gland
oviducts